INTE_CH_0_LOOP
snd_emu10k1x_intr_enable(emu, (INTE_CH_0_LOOP | INTE_CH_0_HALF_LOOP) << channel);
snd_emu10k1x_intr_enable(emu, INTE_CH_0_LOOP << channel);
snd_emu10k1x_intr_disable(emu, (INTE_CH_0_LOOP | INTE_CH_0_HALF_LOOP) << channel);